Electrode support for dust precipitators



March 31, 1931. H} SAUSBURY x 1,798,761

ELECTRODE SUPPORT FOR DUST PRECIPITATORS Filed Oct. 8, 1929 5 Sheets-Sheet 1 March 31, 1931. H. D. SALISBURY 1,793,751

ELECTRODE SUPPORT FOR DUST PRECIPITATORS Filed Oct. 8, 1929 3 Sheets-Shqet 2 March 31, 1931. H. D. SALISBURY 1,798,761

ELECTRODE SUPPORT FOR DUST PRECIPITATORS Filed Oct. 8, 1929 3 Sheets-Sheet 5 Patented Mar. 31, 1931 PATENT OFFICE HOWARD D. SALISBURY, F BIRMINGHAM, ALABAMA ELECTRODE SUPPORT FOR DUST PEEGIPITATOBS Application filed October 8, 1929.

This invention relates in general to improved structural features in precipitation apparatus wherein electrostatic discharges of high voltage from a charged electrode cause a separation of dust particles, or the like from a. gaseous body in which such particles are suspended. The invention aims to provide an improved insulated electrode supporting structure to which access canbe had for the purpose of making examination or repairs; to provide a support-containing chamber, which is normally in communication with the main chamber through which the dust laden gases flow, but which dust support-containing chamber can be isolated from the main chamber without stopping the flow of gas through the latter whenever it may be desired to inspect the electrode support, to clean it to remove it, or to replace it. The invention also aims to provide means, which will return the units of a discharging electrode to their proper relative osition after they have been'thrown out o proper location; and to provide temporary supporting means for a discharge electrode, which are adapted to be brought into play when removing or replacing an electrode supporting insulator.

The invention also provides means where- N by the discharge electrode is automatically grounded. through the structure of the apparatus, when the support-containing chamber is isolated from the main chamber, thereby dissipating any static electric chargewithin the apparatus and also protecting workmen in the event that the electrical ower should be accidently supplied to the discharge electrode circuit while workmen are engaged in repairs.

The invention will be fully apparent from the following specification when read in connection with the accompanying drawings and the features of novelty will be defined with particularity in the appended claims.

In the drawings Fig. 1 is a plan view showing the apparatus with cover removed from main chamber;

Fig. 2 is a vertical section 9n line 22 of Fig. 1; Fig. 3 is an enlarged vertical section on Serial N0. 398,199.

lines 33 of Figs. 1 and 5 showing doors open;

Fig. 4 is an enlarged vertical elevation on line 4-4 of Fig. 1;

Fig. 5 is a sectional plan on line 5-5 of Fig. 4.;

Fig. 6 is a section of the lower part of Fig. 3 showing the doors closed;

Fig. 7 is a sectional plan on line 77 of Fi s. 2 and 3.

igs. '8 and 9 are detail sectional views illustrating modifications.

Referring in detail to the drawings, 11 is a main chamber through which the as to be treated is passed, having within it ischarge electrodes 12 and collecting electrodes 13. The discharge electrodes are supported at four corners by insulators 14 to which hang supporting rods 15 that have collars 16 fastened to them. Holes are provided in main chamber 11 for the supporting rods 15 to pass through and these holes are closed by doors 17 and 18 to close off or isolate auxiliary chambers 19 from the main chamber 11 when it may be desired to do so. The auxiliary chambers 19 are formed in housings having walls 19 and 19 as shown. Supporting rods 15 are threaded at their top ends and pass through holes in the insulators 14, nuts 20 being provided to adjust and support said rods. At 21 is shown a power supply line fastening under nut 20 to one of the supporting rods 15. 22 are covers overinsulators 14. 23 are manhole covers held in place byswinging bolts 24, the manholes providing openings through walls 19 so that the underside of insulators 14 may be inspected and cleaned. The insulator covers 22, as shown at 22, are bolted to the walls 19. The top portions of the insulators may be inspected and cleaned or the insulators removed entirely by simply removing the covers 22 or in the case where a conduit is provided for power line, the insulators may be inspected and cleaned through manhole openings in the walls 19 and replaced through openin s in the conduit, which are formed by remova le sides as indicated at 25. Door 17 is fastened to shaft 26 by key 27 and is operated by means of a lever V fastened to shaft 30 by key 31 and is operated by means of a lever 32 fastened to shaft by key 33. A bolt 34 fastens lever 28 to fixed bracket 35 to hold door 17 in closed position and in similar manner a bolt 36 fastens lever 32 to fixed bracket 37 to hold door 18 in closed position.

When doors 17 and 18 are in open position levers 28 and 32 are in the dotted position shown in Fig. 4.

Doors 17 and 18 are notched as shown in Fig. 5 and rods 15 are brought to proper location by the notches although they may have been shifted out of place by an irregular failure of an insulator.

Ordinarily doors 17 and 18 are open and chambers 19 are open to main chamber 11, with levers in dotted position shown in Fig. 4, but when it may be desired to inspect, clean, remove or replace an' insulator the power supply is cut off and doors 17 and 18 are closed by throwing levers 28 and 32 into position indicated by full lines on Fig. 4 and the doors are then locked in closed position by means of bolts 34 and 36 and brackets 35 and 37.

.In this manner chambers 19 are cut oil' and and 18 when locked in their closed positions form supports for collars 16, which in turn support the discharge electrode. When the said electrodes are thus supported, the nuts- 20 may be removed to disengage insulators 14'so that they may be removed and replaced without difliculty.

As a safety 7 measure after the manholes have been opened sand or suitable plastic materials are placed on top of the closed doors 117 11nd 18 to provide a gas seal that will not From the foregoing it is clear that when the doors 17 and 18 are in the closed position of Fig. 6 the chambers 19 through which the electrode supporting rods 15 extend will be isolated from the main separating chamber 11,. through which the gas to be treated is flowing. By closing the doors 17 and 18 and locking them in closed position as described it is apparent that by coaction with the collars 16 theweight of the electrodes 12 may be taken by the doors instead of by the insulators 14; In short, when the doors are closed the insulators may be relieved of the weight of electrodes 12. This permits of easy and quick removal and replacement of the insulators 14. During the replacement of the insulators, the doors by virtue of the notched or slotted arrangement described serve to accurately spot or locate the supporting rods 15 so that when a new insulator is applied it can be accurately installed so as not to disturb the proper relative position between the electrodes 12 and 13. It is also clear that during the time of change of insulators when doors are closed there will be a metallic connection-between the supporting rods 15 and the other metallic parts ofthe structure. The structure as a whole is usually grounded electrically. This contact between the doors and the rod 15 and collar 16 serves as a safety feature to ground the supporting rods 15 while repairs are being made. This serves to dissipate any static electric charge within the apparatus and also serves to protect workmen engaged in making insulator adjustments or replacements in the auxiliary chamber 19 in the event that the electrical power should accidently be supplied to the discharge electrode circuit.

The discharge electrodes 12 and collecting electrodes 13 are of known construction. The collecting electrodes frequently being made in the form of a series of plate-like slabs of concrete or the like. These collecting electrodes are usually grounded to the metallic parts of the apparatus. The discharge electrodes are usually in the form of suspended bars, which carry a plurality of wires or chains. The discharge electrodes are located between the slabs or plates of the collecting electrodes. The current for the precipitator is provided in the usual manner and the means for supplying such current .is merely diagrammatically indicated in Fig. 2 as this current supply means forms no part of the present invention and is well known to those skilled inthe art.

Fig. 8 illustrates a slight modification wherein the casing of Fig. 3 enclosing the auxiliary chamber 19 is omitted. In the construction of Fig. 8, the insulator 14 rests directly on lugs 14 of a casting 14 secured to the top of the precipitating casing. The other parts are substantially the same as described in connection with Fig. 3 and are correspond ingly numbered.

Fig. 9 illustrates a construction wherein an insulator 40 is supported on a bracket 41 located on the outside of a casing 42. The insulator 40 supports'a conductor 15 which extends into a chamber 43. Communication between the chamber 43 and the outer atmosphere is normally closed by a disc of insulating material indicated at 45 which is detachably secured by members 44 held by bolts 46.

In this construction doors 17 and 18* may be closed so as to support the conductor 15 when the closure member 45 is removed. The casing 42 may be considered as a substantial equivalent of, the casing enclosing the precipitator chamber 11 referred to in connection with Figs. 1 and 2.

Various modifications may be made by those skilled in the art without departing from the invention as defined in the appended claims. i

What I claim is:

1. An apparatus comprising two chamber structures normally in communication, normally open movable closure members controlling such communication, an electric conductor normally supported by one of said structures and adapted to be supported by said closure members when they are closed.

2. An apparatus comprising two chamber structurm normally in communication, n0rmally open movable closure members controlling such communication, an electric conductor having a portion for coaction with said closure members whereby it is supported by the closure members when the latter are closed, and means for holdingsaid closure members in closed position.

3.. An electric precipitator having a main casing forming a treating chamber, a collecting electrode structure and a discharge electrode structure therein, a housing forming an auxiliary chamber communicating with said treating chamber, supporting means for one of said electrode structures passin through said auxiliary chamber and pivotal y mounted members for closing communication between the main treating chamber and said auxiliary chamber.

a. An electric precipitator having a main.

casing forming a treating chamber, a collecting electrode structure and a discharge electrode structure therein, a housing forming an auxiliary chamber normally in communication with said treating chamber, normally open movable'closure members controlling such communication, supporting means for one of said electrode structures passing through said auxiliary chamber, said supporting means adapted to be supported by said closure members when closed and means for holding said closure members in closed position.

' 5. An electric precipitator having a main casing forming a treating chamber, a collecting electrode structure and a discharge electrode structure therein, a housing forming an auxiliary chamber communicating with said treating chamber, supporting means for one of said electrode structure connected to a current supply and means for closing communication betweeii the main treating chamber and said auxiliary chamber, said closing means when closed serving to ground said electrode.

6. An electric 'precipitator having a main casing forming a treating chamber, a collecting electrode structure and a discharge electrode structure therein, a housing forming an auxiliary chamber communicating with said treating chamber, supporting means for one of said electrode structures and movable doors for closing communication between the main treating chamber and said auxiliary chamber, said closing means when closed coacting with said supporting means to locate said electrode structure.

7. An electric precipitator having a main chamber structure and an auxiliary cham her structure and complementary doors for isolating the interiors of the said chamber structures.

8. An electric precipitator having a main chamber structure with an electrode structure therein, an auxiliary chamber structure carrying an insulator, a conductor supported by said insulator and sustaining said electrode structure and movable doors adapted to temporarily engage and support said conductor when said insulator is removed for replacement or repair.

9. An electric precipitator having a main chamber structure with an electrode structure therein, an' auxiliary chamber structure carrying an insulator, a conductor supported by said insulator and sustaining said electrode structure and a grounded member adapted to temporarily engage and support said conductor when said insulator is removed for replacement or repair.

10. An electric precipita-tor having a main chamber structure with an electrode structure therein, an auxiliary chamber structure car" rying an insulator, a conductor supported by said insulator and sustaining said electrode structure and means arranged to ground and support said conductor and thus to permit handling of the insulator and conductor with safety.

11. An electric precipitator having a main chamber structure with an electrode structure therein, an auxiliary chamber structure carrying an insulatona conductor supported by said insulator and sustaining said electrode structure and means for closing communication between the main chamber and auxiliary chamber, said means being movable into engagement with said conductor.

12. An electric precipitator having a collooting and a discharge electrode structure therein, supporting means for the discharge electrode structure including an insulator and a member adjustable longitudinally of said insulator and sustaining said electrode structure whereby the discharge electrode is accurately positioned with relation to the collecting electrode.

13. An electric precipitator having, a plurality of insulator supporting a discharge electrode within a main treating chamber, housings for the insulators which form chambers normally in communication with the main treating chamber, closure means which operate to close the opening between said chambers and the main treating chamber, said insulators arranged to support the discharge electrode through supporting members some of which also serve as line conductors to supply electric current to said discharge electrode.

14. An electric precipitator having a collecting and a discharge electrode structure therein, insulating means for supporting the discharge electrode structure, means for loeating and supporting said discharge electrode structure when the insulating means is beingreplaced, said locating and supporting means also being arranged to prevent the es 5 cape of gas from the precipitator.

15. An electric precipitator having a collecting and a discharge electrode, a plurality of insulated supporting means for the dis- I charge electrode structure, and adjustable means extending longitudinally through said insulating supporting means for positioning the discharge electrode in proper relationship to said collecting electrode. 7

16. An electric precipitator having a plurality of collecting electrodes and a plurality of discharge electrodes, a supporting frame to Which said discharge electrodes are connected, a plurality of insulating means supporting said frame, means for adjusting said frame with respect to said insulating coacting complementary members whereby the discharge electrodes can be properly positioned with relation to said collecting electrodes.

In Witness whereofi'l have hereunto signed my name.

' HOWARD D. SALISBURY. 

